in how many ways can the first and second place in a battle of the bands be arranged if 8 bands practice?

Mathematics

2 answers:

vagabundo [1.1K]4 years ago

7 0

Answer:

= 28

Solution:

C(n,r)=?

C(n,r)=C(8,2)

=8!(2!(8−2)!)

= 28

lesya [120]4 years ago

5 0

The correct answer would be 28

You might be interested in

The ratio of the diameters is 15:11. If the diameter of the smaller ball is 55cm, what is the volume of the larger ball? Round t

gizmo_the_mogwai [7]

Answer:

220,781.25 cubic cm

Step-by-step explanation:

Given ratio of the diameters = 15:11

Let the actual value of of diameters be 15x and 11x to maintain the ratio of 15:11

Given that smaller one has diameter of 55cm

thus 11x = 55cm

x = 55/11 cm = 5

Thus, diameter of larger ball = 15xcm= 15*5cm =75cm.

we know that radius is half of diameter

Radius = diameter/2

Thus radius of larger ball = 75/2 cm = 37.5 cm.

Volume of sphere is given by $(4/3)\pi r^3$

we know that ball has spherical shape

thus volume of larger ball is calculated as given below

$volume \ of \ ball = (4/3)\pi r^3\\=> volume \ of \ ball = (4/3)*3.14* 37.5^3\\=> volume \ of \ ball = (4/3)*3.14* 37.5^3\\=> volume \ of \ ball = 220,781.25$

Thus, volume of larger ball is 220,781.25 cubic cm

5 0

3 years ago

6 divided by negative 3 minus 15 minus 7 divided by negative 2

pickupchik [31]

To answer this question you would need to use PEMDAS. Since you don't have any parentheses or exponents, you would start by doing all division from left to right. After that you would do the subtraction from left to right. Your final answer should be -13.5

4 0

3 years ago

Read 2 more answers

A group of students sold 48 candles in 4 hours.

Degger [83]

Answer: Part A = 12 candles per hour

Step-by-step explanation:

48/4 = 12

6 0

3 years ago

Read 2 more answers

Evan uses 1/3 of his tickets to ride the Loop D Loop twice. What is 1/3 of 24 tickets?